Chain-link.



J. M. DODGE.

GRAIN LINK.

IOATION FILED JULY 8 1913 Patented Mar. 2, 1915.

2 SHBETS SHEET 1- menses.

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JAMES M. DODGE, F PHILADELPHIA, PENNSYLVANIA.

CHAIN-LINK.

Application filed July 8, 1 913. Serial No. 777,912.

270 all whom it may concern:

' Be itknown that I, JAMEs M. Donor, a

citizen of the United States, residing in Philadehohia, Pennsylvania, have invented certain Improvements in Chain-Linksof which the following is a specification.

My invention relates to certain improvements in chain links, especially links used in drive chains, in which the body is rectangular in form with an opening for the reception of the teeth of. a sprocket wheel and provided with a hook at one end by which is coupled to, an adjoining link.

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, Oneobject of my invention is to reduce the cost of manufacture of a link of, this and to increase its strength.

A further object of the invention is to simplii-y the method of assembling the link and hoiik members and to form the side bars so that they will more readily adapt themselves "to the sprocket teeth.

Specification of Letters Patent.

Patented Mar. 2, 1915.

end members, in the present instance, abutting within'the hooksection 2.

As illustrated in Fig. 11, the blank is enlarged at the center to form the end bar 3 and the edges are undercut for a purpose described hereinafter. which form the end members'5, are also increased in width by forming a log on one side, and the portion forming the side bars is pressed so that, when the link member is formed, the inside of each side bar will be round and the outside will be recessed, forming upper and lower ribs, as shown in Fig. 8. This construction not only stifi'ens the A still further object of the invention is to make a built up wrought metal link which will have the same outside dimensions as a standard malleable ir on link of the same type, so that the links will interchange.

. In the accompanving drawings: Figure 1, is a side view of a link made in accordance my invention; Fig. 2, is a longitudinal sectional. View; Fig. 3, is a side v1ewillustrating the parts assembled prior to welding; vl'-ig. .4, is a longitudinal sectional view as the assemoled parts on the-line a-a, Fig. 5; 5, is a plan view; Fig. (3, IS a trans verse sectional view on the line l)'b, Fig. 5;

Fig. 7 is atransverse sectional View on the line o e, Fig. 5', Fig. 8 is a perspective View of the body portion of the link; Fig, 9, is a perspective view of the. hook section with the members thereof assembled; Fig.10, is a perspective view of one-' the members of the hook section; Figs.

ll and 12, are views of the blank from which the body portion of the link is made;

Fig. 13, is a view of a modification of the invention illustrating a solid hook member.

Referring to the drawings, 1 is the body portion of the link, madev rectangular in the present instance, and having an open center into which the teeth .of a sprocket wheel can project. lhis body portion is made from a and 12, bent into shape to form the end bar. 3; side horse, and end members 5;"the two blank, illustrated in Figs. 11

side bars, but also provides a tapered openmg for the sprocket teeth to enter the link.

over to form the round bars illustrated in The ends of the bar,

.The portion forming the end bar 3 is bent Fig. 2, with the abutting, portions on the inside of (the link. 'This end bar is solid and, as the joint is at the inside, it will not materially weaken theend bar.

The blank is notched at .6 at each side of the end bar to form the reduced portions of the side bars to allow one link to be removed laterally from the one to which it is coupled.

By making the ends of the central projections of the:blanlrhndercut as shown in Figs. 11 and 12, the blank is more readily bent and the rounded end portion will extend from one inner wall of the link to able iron. Bymaking the end members narrow, the hook member is not increased in diameter and, consequently, can be made of the same size and shape as the hook member of the ordinary malleable iron link with which it must interchange. The hook member 2, i; the present instance, is made of a series of punched sections 7, Fig. 10, which. are arranged. side by side to form a hook oi the desired widthpas in Fig. 9. Each sec the other, making a complete round end bar 'to form therear wall of the socket of the" completed link, which is substantially the same diameter as the end member 3. The end members 5 extend below the side members t, as shown in Figs. 3 and 4:, and are tapered and curved. The lower end of each end member 5 rests against a shoulderlO in the present instance, insuring the proper assembling of the sections of the link.

When the parts are assembled, they are welded together at 00, Fig. 2, preferably by means of an acetylene flame which is passed over the upper joint between the hook section and the end members of the link section, unitingallof the sections of the socket together,as well as making an integral connection between said members and the link section. A weld joint may be made at a,

Fig. 2, to retain the individualmcmbers of the hook section together, as well as at w within the socket. The parts can be welded at any point or points desired as found most expedient. I preferably bevel the hook elements at 11, so that the welding flame will make a deep weld, and the extra metal of the link section and hook section at each side of the recess formed by the bevel 11 fills the recess, asin Fig. 2, thus insuring a proper weld. After the parts have been assembled and secured by welding, the end members of the bodyportion form a continuation ofthe walls of the socket of the hook section,so that, when an end bar of an adjoining link is mounted in a socket, a neat fit is assured.

By the above construction, I am enabled to make. a built up wrought metal link of the same dimensions as a standard malleable iron link which will interchange with said link.' The distance between the rear and the forward end of the hook member, as indicated by the line y, Fig. 1, is the same as that of a StfiDdilldhlilllBZlblB iron link and this is accomplished by making the end .bar 5 comparatively {thin and wide, allowing suflii cient metal at the back of-the hookmemb'er so that, when the parts are united by welding, they will withstand the strains to which the link issubjected. In some instances, the hook member may-be made solid, as in Fig. 13, and in this case'the hook member 2 may be made from a drawn bar shapedlin cross' section as desired, and cut oft"v in lengths. The endn embers 5 of the body portion 1* m be Welded thereto, as ahbve described. it have shown the two parts 5 of the body part tion shutting in. 8. They may be mediate assembled inthis manner-and-weldcd together when the body portion is secured to the .ihook section, or they may be welded together in advance of the welding of the two portions of the link.

Testshave been made which prove this? adin'k made in accordance withmyinve .tion will stand greater strains than the ordinary standard malleable iron link of the same size. As the link is made by the use of punches and dies and the parts welded, the output canbe materially increased over and above the present universal method of making the links, which is by 'first casting the links and then subjecting them to the process by which they are made malleable. I claim:

' 1. The combination in a chain link, of a body portion made rectangular and having two end bars and two side members connecting the bars; and a hook section having a transverse socket shaped to receive one of the .end bars of the link section, the parts being secured together to form a unitary structure, the end bar forming the rear wall. of the socket for an adjoining link.

2. The combination of a link consisting of a rectangular body portion, two end bars and side members connecting the end bars, one of said end bars being rounded and the other being narrow and curved; and a hook section having a socket therein arranged to receive the narrow end bar of the body portion, the parts being secured together and said end bar forming the rear wall of the socket of the hook section.

3. The combination of a link consisting of a rectangular body portion having end bars and side members connectingthe endbars; a series of hooked elements, each having a socket, said elements being arranged side byside to form a hook member, one end bar of the body portion beinglocated in the socket and secured to the several elements and forming the rear wall 6f the socket of w tion. said parts being secured together, the

end bar forming the rear wall of the socket of the completed link.

5. The combination in a body portion having two end bars and side members connecting the cndbars, one of said end bars being rounded in cross section, the other being curved. the side members being curved in cross section forming upper.,.andl lower, ribs on the outer surface; a hook section ion made of a series of elements spaced side by side, said hook section i'm'ring a tIfiXlSf-{GISQ socket therein of a size to receive the end [air of the body portion and the round end of the adjoining link, said first mentioned end hnr being secured to the hook section.

3. The combination in a link, of a body portion having twocnd ours and side incinhers connecting the end hnrs made from, a hhinlt bent into shape, one end bill" being rounded the side members and the other end oar being greater in height than in width, the lust mentioned end bar being greater in depth than the side members and curved: ii hook member hnving a socket the rear wall of the. socket being curved to con form to the shape of the end bar to which it is txttaehed, while the outer surface of the end her is curved to conform to the front Wall of the socket so as to form a hearing for the end bar of an adjoining iink the two elements being secured together.

7. The combination in a link of body portion having two end bars and side members connecting the end bars made from hhink bent, one. end (it the our being recon, the side members and the other end her be ing greater in height than in width, the last 'nieiitioned end bar being greater n depth than the side members and curved; a hook member having a socket, the rear Wail of JAMES M. DODGE.

Witnesses "NM. E. iii-torn, WM. A, 53min. 

